A poster reading 'Yesterday we were many, today we are alone' can be seen in front of a memorial of flowers and candles near the Joseph-Koenig-Gymnasium secondary school in Haltern am See, western Germany on March 25, 2015, from where some of the Germanwings plane crash victims came. Sixteen German teenagers and two teachers on a school exchange trip were assumed to be among the 150 dead in the crash of a passenger jet in the French Alps, officials said. The head of low-budget airline Germanwings said there were 144 passengers and six crew on the Airbus A320 that crashed on March 24, 2015 in the French Alps en route to Duesseldorf from Barcelona.    AFP PHOTO / SASCHA SCHUERMANN        (Photo credit should read SASCHA SCHUERMANN/AFP/Getty Images)